Connected: An Internet Encyclopedia
RFC 1812 - 5.2.4.1 IP Destination Address

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### 5.2.4.1 IP Destination Address

If:

- the destination address in the IP header is one of the addresses of the router,

- the packet contains a Source Route Option, and

- the pointer in the Source Route Option does not point past the end of the option,

then the next IP Destination Address is the address pointed at by the pointer in that option. If:

- the destination address in the IP header is one of the addresses of the router,

- the packet contains a Source Route Option, and

- the pointer in the Source Route Option points past the end of the option,

then the message is addressed to the system analyzing the message.

A router MUST use the IP Destination Address, not the Ultimate Destination Address (the last address in the source route option), when determining how to handle a packet.

It is an error for more than one source route option to appear in a datagram. If it receives such a datagram, it SHOULD discard the packet and reply with an ICMP Parameter Problem message whose pointer points at the beginning of the second source route option.

Next: 5.2.4.2 Local/Remote Decision

Connected: An Internet Encyclopedia
RFC 1812 - 5.2.4.1 IP Destination Address